Remove any pruned block & undo files that are still on disk. This could happen on some systems if the file was still being read while unlinked, or if we crash before unlinking.
Declared in <node/blockstorage.h>
[[requires_capability(0x7f95130c8f68), requires_capability(0x7f950163c258), requires_capability(0x7f95241d9248), requires_capability(0x7f951f330548), requires_capability(0x7f950b9c2508), requires_capability(0x7f95175c4c58)]]
void
ScanAndUnlinkAlreadyPrunedFiles();